Row sums of array T as in A054144.

Terms

a(0) =0a(1) =2a(2) =12a(3) =58a(4) =256a(5) =1072a(6) =4336a(7) =17112a(8) =66304a(9) =253280a(10) =956608a(11) =3579680a(12) =13292544a(13) =49039360a(14) =179912448a(15) =656874368a(16) =2388205568a(17) =8650598912a(18) =31231020032a(19) =112419973632a(20) =403596148736